Product Overview
Technical Summary
| Product designation | SIRIUS soft starter |
|---|---|
| Rated operational current | 356 A at 40 °C; 315 A at 50 °C; 280 A at 60 °C |
| Inside-delta operational current | 617 A at 40 °C; 546 A at 50 °C; 485 A at 60 °C |
| Motor power at 400 V, standard circuit | 200 kW at 40 °C |
| Motor power at 400 V, inside-delta circuit | 355 kW at 40 °C |
| Operating voltage | 200 … 460 V, standard and inside-delta circuits |
| Control supply | 230 V AC at 50 Hz and 60 Hz |
| Connections | Busbar connection for main current circuit; screw-type terminals for auxiliary and control circuits |
| Mounting | Screw fixing; vertical mounting surface +/-90° rotatable and +/-22.5° tiltable to the front and back |
| Front protection | IP00; IP20 with box terminal/cover |
| Product lifecycle | Start of final year of support |
Key Features
- Product designation: SIRIUS soft starter with integrated bypass contact system and thyristors.
- Rated operational current: 356 A at 40 °C; 315 A at 50 °C; 280 A at 60 °C.
- Inside-delta capability: 617 A at 40 °C, 546 A at 50 °C, and 485 A at 60 °C for 3-phase motors in inside-delta circuit.
- Motor power at 400 V: 200 kW at 40 °C in standard circuit and 355 kW at 40 °C in inside-delta circuit.
- Supply and connections: 200 … 460 V rated operating voltage for standard and inside-delta circuits; screw-type terminals for auxiliary and control circuits.
- Installation and protection: Screw fixing; dimensions 210 mm x 230 mm x 298 mm; front protection IP00, or IP20 with box terminal/cover.
Frequently Asked Questions
What product does Siemens 3RW4446-6BC44 identify?
It identifies a SIRIUS soft starter.
Which specifications distinguish the 3RW4446-6BC44 variant?
The listed variant has 356 A at 40 °C, 200 kW at 400 V in standard circuit, 200 … 460 V operating voltage, and screw-type terminals for auxiliary and control circuits.
What connection details should be checked against the nameplate?
Check the busbar connection for the main current circuit, screw-type terminals for auxiliary and control circuits, and 3 poles for the main current circuit.
What should be provided for a quotation request?
Provide the complete order number 3RW4446-6BC44, the required quantity, and the destination.
